Thanks Gordo,
Very aware of this, we're looking for a bit more user information regarding each of the softwares.
Items like:
How's the support?
Learning Curve?
Color Accuracy?
Ease of Installation?
Or are you implying an answer without physically telling me?
My intent was to help you set your expectations. My reading of the criteria in your question suggested that perhaps it wasn;t thought through completely - I'm probably wrong on that, my apologies if I was.
If you don't control the displays (and environment) at the remote site(s) then color "accuracy" is not possible. If that's your goal then you can give up now. If your criteria changes to who provides the best remote content proofing then it's a different story.
Since I've got one foot in it I might as well put the other foot in it.
In my experience remote accurate color proofing is not possible. You can have two monitors set up to match each other perfectly (by the numbers the same as same is possible). That does not mean that they can be used for anything other than "pleasing color" usage. I.e. that high degree of color accuracy (and associated complication) does not actually provide any tangible value in production.
It's not a technical issue - it's a human vision issue.
I've seen soft-proofing used at press at major publications to replace physical proofs and they are not used for checking color by the press operators. They are used to check content and individual CMYK image content (separations). Again, this is because of the mechanics of human vision.
So, if I were in your shoes I would concentrate more on issues related to remote content proofing.
Issues like how does the remote site view the proofs? I.e. do they have a dedicated website that they access to view their proofs?
Who controls access to the proofs.
What do you expect the customer to do when they view the proof.
Does it record customer access?
Who controls sign off?
Is the proofing site collaborative? Does it need to be?
How are the proofs marked up for changes, alterations, etc?
What's the user interface like? Is it intuitive or is there a learning curve.
Are update notifications automatic or manual?
How are update notifications sent (email, vmail, etc.)
Can proofing be done using tablets, cellphones, etc. or only on workstations?
Etc, etc.
I.e. Since all these remote system work from a mechanical point of view - I would concentrate on functionality and usability first.
best, gordo (wearing my asbestos suit)